com.hardcode.gdbms.engine.data.edition
Interface InternalBuffer

All Known Implementing Classes:

MemoryInternalBuffer

public interface InternalBuffer

The internal buffer must store the records in the same position all the time

Method Summary

void	addField()
Value	getFieldValue(long rowIndex, int fieldId)
long	insertRow(Value[] values) Inserts a row with data
void	removeField(int index)
void	restoreStatus() Restores the snapshot created in the last call to saveStatus
void	saveStatus() Creates a snapshot of the internalbuffer to restore it in the next call to restoreStatus
void	setFieldValue(long row, int modifiedField, Value modifiedValue)
void	setRow(long row, Value[] modifiedRow) Set the modified row at the specified index
void	start()
void	stop()

Method Detail

insertRow

long insertRow(Value[] values)
               throws DriverException

Inserts a row with data

Parameters:

values - values of the data to be inserted

Returns:

index where the row is inserted

Throws:

DriverException - if the operation fails

setRow

void setRow(long row,
            Value[] modifiedRow)
            throws DriverException

Set the modified row at the specified index

Parameters:

row - index of the row to update

modifiedRow - Value array with the update

Throws:

DriverException - if the update fails

setFieldValue

void setFieldValue(long row,
                   int modifiedField,
                   Value modifiedValue)
                   throws DriverException

Parameters:

row -

modifiedField -

modifiedValue -

Throws:

DriverException

start

void start()
           throws DriverException

Throws:

DriverException

See Also:

DataSource.start()

stop

void stop()
          throws DriverException

Throws:

DriverException

See Also:

DataSource.stop()

getFieldValue

Value getFieldValue(long rowIndex,
                    int fieldId)
                    throws DriverException

Throws:

DriverException

See Also:

ReadAccess.getFieldValue(long, int)

removeField

void removeField(int index)

addField

void addField()

saveStatus

void saveStatus()

Creates a snapshot of the internalbuffer to restore it in the next call to restoreStatus

restoreStatus

void restoreStatus()

Restores the snapshot created in the last call to saveStatus